Internal-combustion engine.



AGr. R. BUTT & K. LANGNICKEL. INTERNAL COMBUSTION ENGINE. ArrLroATIoN FILED un. za, 1906.

' Patented May 4, 1909.

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G. R. BOTT & KLANGNIGKEL.l

INTERNAL GOMBUSTION ENGINE.

APPLICATION FILED 11158.23, 1906.

Patented May 4, 1909.

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GEORGE R. BOTT AND KURT LANGNICKEL, or INDIANAPOLIS, INDIANA.

' INTERNAL-oo s.:

earning ortica.

USTION ENGINE.

Specification of Letters Patent.

Patented May 4.-, 1909.

Application filed March 23, 1906. Serial No. 307,574.

To all whom it may concern:

`Be it known that we, GEORGE R. Bo'r'r and KURT LANGNICKEL, citizens of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful nr provements in Internal-Combustion Engines,

Aof which the followin is a specification.

ln the operation o internal combustion engines of the two-cycle type the fresh charge is drawn into the cylinder by and into .intimate association with the outgoing spent gases, and there is consequently a lessening of efficiency of t-he new charge due to mixture and also a possibility of premature firing.

The ,object of our present invention is to provide an engine, preferably of the twocycle type, in which a separatinglayer of fresh air may be introduced between the outgoing spent gases and the incoming charge. A further Object of our invention is to provide means for controlling the amount of fuel supplied to the engine andy the compression thereof. y

Qi further Object of our invention is to provide such improvements in detailsof construction as shall hereinafter be pointed 'out. The accompanying drawingsl illustrate our invention. y

Figure 1 is'an axial section with the piston in position for initial exhaust; Fig. 2 a similar section 45 fromFig. 1. With the position for supplemental exhaust; Fig. 3. a view similar to Fig. 2 but at right angles thereto;-.F1g. 4 a transverse section on line 4 4 of. Fig. 2; Fig. 5 a sectional detail of thel inlet valve operating mechanism, and Fig. 6 a view `at right angles to Fig. 5.

inthe drawings, 10 indicates apower or Vcombustion cylinder Which communicates at onev end with a vacuum cylinder 11.J

Mounted in the two cylinders 10 and 11 is a piston12 having alportion 13 which fits the cylinder 10 and an enlarged portion 14 which fits the cylinder '11the difference in diameter being such that the effective vol- 11, said passages forming the ports 20 in the cylinder 10 at the end of the stroke of the inner end of portion 13 of the piston. rlfhe portion 13 of the piston is provided with transverse exhaust passages 21 which lead to the circumference of the portion 13 some distance from the inner end thereof and are adapted to register with exhaustports 22\ formed through the walls of cylinder 10 and connnunicating with the exhaust chamber 23. In order thatthe exhaust passages 21 may not register kwith the ports 20, We arrange the exhaust ports 22 between the ports 20. f

A passage 25for1ns a communication between cylinder 11 and the exhaust passage 23 and a suitable check valve 26 is placed between so as to prevent any return of gases to the cylinder 11.

The crank base .forms a compression chamber 27 with a suitablecheck valve 28 leading thereinto, and a passage 29 leadsv from the compression,chamber 27 to the inletpassage 15, a valve 30 being placed between the passage 29 and passage 15. Valve 30 is carried by a suitable stem 31 which is positively actuated by suitably timed mechanis1n.

The speed of the engine depends upon uthe load and the force applied yto the load and sol the force is proportionate vto the amount of I fuel supplied for any given explosion .and

the degree of compression. We find it,pos

lof charge and the degree of compression. ForI this purpose We provide a cam shaft 32 suitably geared to the crankshaft and provided with a cam 34 having two sets of cam surfaces 35 'and 36. The surfaces 35 flank the surface 36 and are adapted to be engaged by the bifurcated end of a tubular slide 37 upon Whiclrrests the lower end of an angu- 'larly adjustable! sleeve 38 -carried by the lower end of the valve stem 31. The lower endl of the sleeve 38 is threaded to receive the threaded. upper end of a pin 39 which extends through the sleeve 37 and has Its lower end arranged in alinement with the cam surface 36. The cani surfaces 35 are arranged in advance of the cam 36 for a purpose which will appear.

.In order to equalize the delivery of fuel through the passage 29 We provide a .storage chamber@ Whichlcommumcates Wlth the compression chamber 27 through a passage 41 ported at 41 through the 'wall of the cylinder 11 near the lower end thereof, the ar- `rangement being such that,l when the piston 12 is near. and at the lower end ofits stroke the portion 14 thereof will cut off communication between the compression chamber27 and the storage chamber 420.

The operation is as follows: Supposing a charge to have been consumed in the cylinder 10 and the piston to be moving in the direction indicatedby the arrow in Fig. 1, when the piston has reached the point shown in Fig. 1 the exhaust passages 21 of the piston will have been brought into registry with the exhaust ports 22 and the spent gases will exhaust therethrough in the manner common in two-cycle engines, the pressure within the cylinder 10 being reduced approximately to atmospheric pressure. At the same time there has been produced in the cylinder 11 a considerable vacuum. The piston then moves downward and the exhaust passages 21 are drawn downward away from the ports 22 and said ports closed.- At about the time the exhaust ports 22 are closed by the inner end of the portion 13 of the piston, the ports 20 are uncov- -ered and a portionf of the remaining spent gases rush from the cylinderl() through/the passage 2O into the cylinder 11. At the time the ports 20 are uncovered the air y valve 16 is opened and fresh air is drawn into the cylinder 10, the spent gases being almost entirely driven through the passages 2O bythe incoming air. Thile the piston is moving downward afresh charge, which has been previously drawninto the chamber 27 through valve 28,- is being compressed in the chamber 27 and storage chamber 40, the

` passage A11 affording free communication euntll the end 14 of the piston 12 covers port l 41. The charge in chamber 40 isthereby imprisoned Ithereinuntil it is released by the Lupward `movement of the piston. l/Vhen the piston starts upward .it 'irstcloses port-s 20 f and as soonas'saidv ports have been closed the valve 30 is lopened and a fresh charge .p rushes infthrough passagel.' As the piston continues to move upward the exhaust passages 21 come again into registry with the ports '22 and there isa slight discharge' through these ports,lthe discharge being the remaining spent gas and some fresh air which was previously admitted through the "air valve 16. Asl soon as the ports 22 are closed bythe upward movement of the -piston, port 41" is opened and the pressure in the chamber 27 is reinforced by the pressure within the storage chamber 40, thus continu- Ling the movement of a fresh charge, into the cylinder 10, this movement of the fresh .charge continuing until the pressure within the chambers 27 and40 and the cylinder 10 are' equalized. If the pin 39 has been wit-hdrawn into the sleeve 37 theA cams 35 will permit the closing of the valve 30 at about the time of equalization of pressure just mentioned, and the further upward movement o f the piston will produce the necessary compression of the fresh charge. If, on the other hand, the pin 37 has been projected into the path of movement of the cam 3G said cam will engage the pin and prevent the valve 3.0 from closing so soon, thc

amount of delay of closing `of the valve depending upon the amount of projection of the pin 39 from the sleeve 37. Consequently a portion ofthe charge which has been delivered into the cylinder 10 will be forced back out of the cylinder 10 into the passage 29, thus decreasing the amount of charge and also decreasing the amount of compression of that charge. The air valve 16 need not be positively actuated but we prefer to malre it in that way.

Sleeve 38 is provided with an operating arm 38 which may be connected to a speed controller governor l(not shown) so that it may be automatically operated.

At high speed it is desirable to limitthe volume of the compression chamber and we therefore arrange, in passage 41, a valve 4:2 which may be operated by any suitable means, suchas a lever 43.

We claim as our invention:

1. In aninternal combustion engine of the two cycle type, a main -body having formed therein a combustion chamber,l a vacuum chamber, a compression chamber, a secondary-exhaust `passage forming ya communication between the combustion chamber and 'vacuum chamber and closed and opened by a piston structure, primary exhaust ports leading from thecombustion chamber and opened and closed by the piston in advance of the secondary-exhaust passage, and a fuel passage forming a communication between the compression chamber andthe combustion chamber, a valve mounted in the fuel passage, meahs for positively` actuating said valve, means for-varying the time of closmg of said valve, a valved air passage leading into the combustion chamber, and the piston structure. f -v 2. In an internal combustion engine fof the two cycle type, a main body having formed therein a combustion chamber, a yvacuum chamber, acompression chamber, a secondaryfexhaust passage forming a communication between the combustion chamber and vacuum chamber and closed and opened by a piston structure, primary exhaust ports lead# ing from the combustion chamber and opened `and closed by the piston in advance of the secondary-exhaust passage, and a fuel passage forming la communication between the compression chamber and the combustion chamber, a valve-mounted in the fuel passage, means for positively actuating said valve, a

valved air passage leading into the combus-v tion chamber from the exterior, and the piston structure.

tWocycle type, a mainl body having formed therein a lCombustion cylinder, a vacuum cylinder of greater diameter, a compression chamber, a ported secondaryexhaustl passage forming a communication between the combustion cylinder and yvacuum cylinder, an exhaust passage leading from the combustion cylinder in advance of the secondary exhaust-passage, and a fuel 'passage leading from the compression chamber to the combustion cylinder; a piston structure having a portion fitting the combustion cylinder adapted to open and close the inner ends of the exhaust passage and secondary-exhaust passage, and also having a portion fitting the vacuum cylinder, a: valve mounted in the fuel passage, means for positively actuating said. valve, and a valved air passage leading into the combustion cylinder.

4. In an internal combustion engine of the two-cycle type, a main body having formed therein a combustion cylinder, `a vacuum cylinder of greater diameter, a compression chamber, a ported secondary-exhaust passage forming a communication between the combustion cylinder and vacuum cylinder, an exhaust passage leading from the combustion cylinder in advance of the secondary exhaust passage, and a fuel passage leading from the compression chamber to lthe farther end of the combustion cylinder; a piston structure having a portion fitting the combustion cylinder adapted to open and close the inner ends of the exhaust passage and .secondary-exhaust passage, and also having a rtion fit-tin the vacuum cylinder, a va ve 'mounted in the fuel assage, means for positively actuating sai valve, anda valved air passage leading into the combustion cylinder.

5. In an internal combustion engine of the two-cycle type, a main body having formed v therein a combustion cylinder, a vacuum cylinder'of greater diameter, a compression chamber, a secondary-exhaust passage forniing a communication between the combustion cylinder and vacuum cylinder, an exl haast passageleading from the combustion cylinder,4 and'a fuel-passage leading from` thecompression chamber to the combustion 'cylinder; a piston structure having)a tio'n fitting the combustion cylinder adapted A toopen and close the inner ends of the exhaust. passage and secondary-cirkaust4v passage, and also having a poition'fitting the vvacuum cylinder, a valve mounted in the fuelpassa'ge', means for positivel actuating valve, means for varyingt e time of closing of said valve, and a valved air pas-A sage leading into thev combustion cylinder.

6. In anv internal combustion -engine of formed therein a combustion cylinder, a v vacuum cylinder of greater diameter, a coin- 3. In an internal combustion engine of the pression chamber, a `secondary-exhaust passage forniing a communication between the combustion cylinder and vacuum cylinders, an exhaust passage leading from the combustion cylinder, and a fuel-passage leading from the compression chamber to the farther end of the combustion cylinder; a piston structure having` a'portion fitting the combustion cylinder adapted to open and close the inner ends ofthe exhaust passage and secondary-exhaust passage, and also having a portion fitting the vacuum cylinder, a valve mounted in the fuel-passage, means for positively actuating said valve, means for varying the time of closingl of said valve,

.and a valved air-passage leading into the combustion cha mber.

7. ln an internal combustion engine, the

combination, with a combustion chamber, a vacuum4 chamber, a compression chamber, an exhaust passage leading from the combustion chamber, a secondary-exhaust pas@ sage ,forming a communication between the combustion chamber and vacuum chamber, a fuel passage' between the compression chamber and combustion chamber, and an air passage leading into the combustion chamber, of mechanism for opening the sev'- eral passages in the following order; first, the exhaust; second,'the secondary exhaust; third, the air inlet, and, fourth, the fuel passage.

l8. In an internal combustion engine of the two-cycle type, the combination, with a combustion cylinder, a vacuum cylinder, an

cexhaust passage leading from the combustion cylinder, a secondary-exhaust passage forming a communica-tion between the combustion cylinder and vacuum cylinder, a

compression chamber, a fuel passage between the compression chamber and combustion cylinder, and an. air passage leading into the combustion cylinder, of a piston structure mounted in the combustion and vacuum chambers .and adapted to open and close the exhaust and seconda-ry exhaust, valves for controlling the fuel and air passages, and means forcontrolling saidva'lves, the arrangement being such as to open the several passages in the following order; first, the exhaust; second, the secondary-exhaust; third,V the air inlet,"and, fourth, the fuel passage. f

9. In an internal combustion engine of the two-cycle type, a main body having formed therein a combustion chamber, .a vacuum chamber, a compressionchamber, a I secondary-exhaust passage forming a communication between lthe combustion chamber and vacuum chamber with an inner end 4closed and opened by a piston structure, primary exhaust passages leading from the combustion chamber and opened and closed by the piston in advance of the secondaryexhaust passage,'and a fuel passage forming a communication between the compression chamber and the combustion chamber, a

valve mounted in the fuel passage, means for positively actuating said valve, means for varying the time of closing of said valve, a valved air passage leading into the combustion chamber, and the piston structure, a storage compression chamber, and means for intermittently connecting and disconnecting said storage chamber `with the fuel passage.

10. In an internal combustion engine of the two-cycle type, a main body having formed therein a combustion chamber, a vacuum chamber, a compression chamber, a secondary-exhaust passage forming a communication between the combustion chamber and vacuum chamber with an inner end closed and opened by a piston structure, primary exhaust'passages-leading from the combustion chamber and opened and closed by the piston in advance of the secondary- `exhaust passage, and a fuel-passage forming a communication between the compression chamber and the combustion chamber, a

valve mounted in thefuel passage, means for positively actuating said valve, a valved air passage leading into the combustion chamber, the piston structure, a storage compression chamber, and means for intermittently connecting and disconnecting said storage chamber with the fuel passage.

11. In an internal combustion engineof the two-cycle type, a main body having formed therein ay combustion cylinder, a

vacuum cylinder of greater diameter, a compression chamber, a secondary-exhaust passage forming a communication between the combustion cylinder and vacuum cylinder, an exhaust passage leading from the combustion f cylinder, a storage compression chamber, a passage between said storage chamber and the compression chamber; and a fuel passage leading from the compression chamber to the combustion cylinder; 'a piston structure having a portion itting the combustion cylinder adapted to open and close the inner ends of the exhaust passage and secondary-exhaust passage, and also havinga portion lit-ting the vacuum cylinder adapted to open and close the passage between the two compression chambers, a valve mounted in the fuel passage, means for positively actuating said valve, and a valved air passage leading into the combustion cylinder.

12. Inan internal combustion engine of the two #cycle type, a main body having formed therein a combustion cylinder, .ai

vacuum cylinder of greater diameter, a compression chamber, a secondary-exhaust passage forming a communication betweenY '65 the combustion cylinder and vacuum cylinber, a passage between said storage chamber and the compression chamber, and a fuel passage leading from the compression chamber to the farther end ofthe combustion cylinder; a piston structure having a portion fitting the combustion cylinder adapted to open and close the inner ends of the exhaust passa e and secondary exhaust passage, and a so having a portion tting the vacuum cylinder adapted to open and close the assage between the two compression cham ers, a valve mounted in the fuel passage, means for positively actuating said valve, and a valved air passage leading into the combustion chamber.

13. In an internal combustion engine of the two-cycle type, a main body having formed therein a combustion cylinder, a vacuum cylinder of greater diameter, a compression chamber, a secondary-exhaust passage forming a communication between the combustion cylinder and vacuum cylinder, an exhaust passage leading from the combustion cylinder, a storage compression chamber, a passage between said storage {,'chamber and the compression chamber, and r-a fuel-passage leading from the compression chamber to the combustion cylinder; a piston structure having a portion fitting the combustion cylinder adapted to open and close the inner ends of the exhaust passage and` secondary-exhaust passage, and also having a portion fitting the vacuum cylinder adapted to open and close the passage between the two compression chambers, a valve mounted in the fuel-passage, means for positively actuating said valve, means for varying the time of closing of said valve, and a valved air passage leading into the combustion cylinder.

14. In an internal combustion en ine of the two-cycle type, a main body aving formed therein a combustion cylinder, a vacuum cylinder of greater diameter, a compression chamber, a secondary-exhaust passage forming a communication between the combustion cylinder and vacuum cylinder, an exhaust passage leading from the combustion cylinder, a storage compression chamber, a .ported passage between said storage chamber and the compression chamber, and a fuel-passage leading from the time of closing'ofsaid valve, and avalved air-passage leading into the combustion cylinder.

15. lIn an internal combustion engine, the combination, with a combustion chamber, a vacuum chamber, a compression chamber, an exhaust passage leading from the combustion chamber, a secondary-exhaust passa e formi a communication between the combustion chamber' and vacuum chamber, a fuel passage between the compression chamber and combustion chamber, a stor e pressure chamber, a passage connecting t e two'compression chambers, and an air passage leading into the combustion chamber, of means for intermittently openin the several passages in the following or er; first,`

the exhaust; second, the secondary exhaust; third, the air inlet, and, fourth, the fuel passage and passagebetween the two compression chambers. v

16. In an internal combustion engine of the two-cycle type, the combination, with a combustion chamber, a vacuum chamber, an exhaust passage leading from the combustion chamber, a secondary-exhaust passage formi-ng a communication between the combustion chamber and vacuum chamber, a.

compression chamber, a fuel passage be? tween the compression chamber and. com- 1 bustion chamber, a storage pressure chamber, a passage connecting the two compression chambers, an air passage leading into the combustion chamber, a piston structure mounted in the combustion and vacuumchambers and adapted to open and close the exhaust and secondary exhaust, valves for controlling the fuel and air assages, and means for controlling said va ves,

the arrangement being such as to intermittentlyopen the several passages in the following order; rst, the exhaust;'second, the secondary-exhaust; third, the air inlet, and, fourth,`the fuel passage and passage between the two compression chambers.

17. In an internal combustion en 'ne of avmg vacuum chamber, a compression chamber, a

:secondary-exhaust passage forming a .com- `imumcationy between the-combustion chamber and vacuum chamber and closed and opened by a piston structure',` primary exhaust passages leading from the combustlon chamber and opened and closed bythe piston in advance lof the lsecondaryexhaust passage, anda fuel .passageformm'ga communication between the compresslonfcham# termittently connecting and disconnecting said storage chamber with the fuelpassage, and means for adjusting the eective connection between the main compression chamber and the storage chamber.

18. In an internal combustion engine of the two-cycle type, a mainvbody having formed therein a combustion chamber, aI vacuum chamber, a compression chamber, a secondary-exhaust passage forming a communication between the combustion chamber and vacuum chamber and closed and opened by a piston structure, primary exhaust ports leading from the combustion chamber and opened and vclosed by the piston in advance of the secondary-exhaust passage, and a fuel-passage forming a communication between the compression cham- `ber and the combustion chamber, a valve mounted in the fuel passage, means for positively actuating said valve, av valved air assage leading into the combustion cham er, and the piston structure, a storage compresnecting and disconnecting said storage -chamber with the fuel passage, and means for adjust-mg the effective connection between the main compression chamber and the storage chamber.

19. In an internal combustion engine of the two-'cycle type, a' main bodyhaving formed therein a combustion cylinder, -a vacuum cylinder of greater diameter, a compression chamber, a secondary-exhaust passage forming'a communication betweenthe combustion cylinder andl vacuum cylinder, an exhaust passage leading from the combustion cylinder, alsto'rage compression chamber, a passage between said storage chamber and the compression chamber, and a fuel passage leading from the compression chamber to the combustion cylinder; a piston structure havingr a portion vfitting the combustion chamber adapted to open. and close the inner ends of the exhaustY passage and secondary-exhaust passage, and also havin a portion fitting the vacuum cylinder a aptedto open and close the assage l sion chamber, means for intermittently conbetween the two compression cham ers, a

valve mounted in the fuel passage, means for positively actuating said valve, a valved air passavo leadin vinto the combustion cylinder, `an means Lfor adjusting the effective connection between the main compression chamber and the storage chamber.

, 20. Inan internal combustioh en ine of the two-cycle type, a main body aving formed therein a combustion cylinder, a

`vacuum 'cylinder of greater diameter, a

compression chamber, a secondary-exhaust .passage forming a communication between -the combustion cylinder and. Vacuum cyllnder, anpxhaust assage-leading from the combustion cylm er, a storage compression chamber-,a ported passage between said storage chamber and the compression chamber, and a fuel passage leading from the compression chamber to the farther end of the combustion cylinder; a piston structure havinga portion fitting the combustion chamber adapted to open and close the inner ends -of the exhaust passage and secondary exhaust passage, and also having a portion 4itting the vacuum cylinder adapted to open and close the passage between the two compression cylinders,l a Ivalve mounted in the fuel passage, means for positively actuating said valve, a valved air passage leading into the combustion cylinder, and 'means for adjusting the effective connection between the main compression chamber and the storage compression chamber to the 'combustion cylinder; a piston structure having a portion fitting the combustion cylinder adapted to open and close the inner ends of the exhaust passage and secondary-exhaust passage, andv also having a portion fitting the vacuum cylinder adapted to open and close the passage between the two compression chambers,

a valve mounted in the fuel-passage, means' for positively actuating said valve, means for varying the time of closing of said valve, a valved air passage leadingl into the combustioncylinder, and means for adjusting the effective connection between the main compression-chamber and the storage chamber.

22. In an internal combustionl engine of the two-cycle type, a main body having formed.. therein a combustion cylinder, a vacuum cylinder of greater diameter, a compression chamber, aseCOndary-exhaust pas- -sage forming a communication between the combustion cylinder and vacuum cylinder, an exhaust passage leading from the combustion cylinder, a storage compression chamber, a passage between said storage chamber and the compression chamber, and a fuel-passageleading from the compression chamber tothe farther end of the combus-v tion cylinder; a piston structure having a portionV fitting the combustion cylinder adapted to open and close the inner ends of the exhaust passage andl secondary-exhaust passage, and also having a; ortion fittin the vacuum 'cylinder adapte to open an ,close'the' passage between the two compression chambers, a valve mounted in the fuelpassage, means for positively actuating said valve, means for varying the time of closing of saidvalve, a valved air-passage leading into the combustion cylinder, and means for adjusting the effective connection between the main compression chamber and the storage chamber.

23. In an internal combustion engine, the combination, with a combustion chamber, a vacuum chamber, a compression chamber, an exhaust passage leading from'the combustion chamber, a secondary-exhaust passage forming a communication between the combustion chamber and vacuum chamber, a fuel passage between the compression chamber and combustion chamber, a storage pressure chamber, a passage connecting the two compression.chambers, and an air assage 'leading into the combustion cham er, of

means for intermittently opening the several passages in the following order; first, the exhaust; second, the secondary exhaust; third, the air inlet, and,-fourth, the fuel passage and passage between the two compression chambers, and means for adjusting the' eifective connection between the main compression chamber and the storage chamber.

24. In an internal combustion engine of the two-cycle type, the combination, with a combustion chamber, a vacuum chamber, an exhaust passage leading from the combustion chamber, a secondary-exhaust passage forming a communication between the combustion chamber and vacuum chamber, a compression chamber, a fuel passage between the compression chamber and combustion chamber, a storage pressure chamber, a passage connecting the two compression chambers, an air passage leading into the combustion`chamber, a pistonestructure mounted in the combustion and vacuum chambers and adapted to open and close the exhaust -and secondary exhaust, valves for controlling the fuel and air passages, and means for controlling said valves, the arrangement being such as to mtermittently open the several passages in the following order; first, the i exhaust; second, the secondary exhaust; third, the air inlet, and, fourth, the fuel passage and passage between the two compression'chambers, and means for adjusting the effective connection between the main lompression,chamber and the storage cham- In witness whereof, we have hereunto set i our hands and seals at Indianapolis, Indiana,

this-19th day of March, A. D. one thousand L. s] [1.. s.] 

